|Publication number||US8169291 B2|
|Application number||US 12/652,966|
|Publication date||May 1, 2012|
|Filing date||Jan 6, 2010|
|Priority date||Jan 6, 2010|
|Also published as||US20110163838|
|Publication number||12652966, 652966, US 8169291 B2, US 8169291B2, US-B2-8169291, US8169291 B2, US8169291B2|
|Inventors||Wen-Tsung Cheng, Wen-Ho Cheng|
|Original Assignee||Wen-Tsung Cheng, Wen-Ho Cheng|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (38), Referenced by (2), Classifications (7), Legal Events (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
1. Field of the Invention
The present invention relates to a fuse, and more particularly to a combination-type fuse.
2. Description of Prior Art
Fuse is an over-current protection device generally used in an electric appliance or a circuit, and a fuse filament of the fuse melts or the fuse blows to prevent over-current from damaging electronic components installed in the electric appliance, since current will be increased if the electric appliance breaks down or the circuit fails to operate normally, and the current passed through the electric appliance or circuit will exceed a loading limit of the fuse. Therefore, the fuse can achieve the effects of protecting electric appliances and circuits.
As disclosed in U.S. Pat. No. 6,359,543, a conventional combination-type fuse comprises a conducting terminal and two casing plates, and the two casing plates include electrically conductive plates passed through the two casing plates and engaged with each other, such that the electrically conductive plates are fixed inside the fuse. However, the two casing plates of the fuse of this sort may be loosened or separated easily, and the positions of the electrically conductive plates may be deviated easily, and thus affecting the normal operation of the fuse. Furthermore, the two casing plates are made from two different molds, not only incurring a higher molding cost, but also taking a longer assembling time and requiring a higher manufacturing cost.
Therefore, it is a primary objective of the present invention to provide a combination-type fuse featuring a simple structure and an easy installation to reduce the manufacturing cost.
Another objective of the present invention is to provide a combination-type fuse, whose conducting terminal is passed and fixed securely to the insulating base.
To achieve the foregoing objective, the present invention provides a combination-type fuse comprising an insulating base and a conducting terminal, and the insulating base is integrally formed and includes a groove and two concave pits interconnected to the groove, wherein the conducting terminal is accommodated into the groove, and the conducting terminal includes two conductive handles, a fuse filament coupled to the two conductive handles, and a forked holding portion formed at an end of each conductive handle and fixed into the concave pit.
Compared with the prior art, the combination-type fuse of the present invention includes an integrally formed insulating base, such that the fuse will not be loosened or separated easily. In addition, only one mold is required for the manufacture, and thus reducing the molding cost. Since the forked holding portion is formed at an end of the conductive handle, therefore the forked holding portion can be spread open and fixed to the concave pit by compressing the forked holding portion, and the conducting terminal can be combined with the insulating base securely. With such simple assembling process, the assembling time can be reduced, not only improving the yield rate of the fuse, but also lowering the manufacturing cost and enhancing the practicability of the present invention.
The technical characteristics, features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings. The drawings are provided for reference and illustration only, but not intended for limiting the present invention.
With reference to
The insulating base 10 is an integrally formed T-shaped base, and the insulating base 10 includes a groove 11 and two concave pits 12 interconnected to the groove 11, wherein the insulating base 10 has a block 13 extended into the groove 11, and the two concave pits 12 are arranged linearly at the top side of the insulating base 10, and the groove 11 is arranged parallel to the two concave pits 12, situated at internal sides of the two concave pits 12, and transversely passed through the insulating base 10.
The conducting terminal 20 is an electrically conductive metal plate passed through the bottom side of the insulating base 10 and accommodated into the groove 11, and the conducting terminal 20 includes two conductive handles 21 and a fuse filament 22 connected to the two conductive handles 21, wherein each of the conductive handles 21 has a plurality of through holes 210, and a forked holding portion 211 formed at an end of the conductive handle 21, and the forked holding portion 211 is slightly flexible, such that the forked holding portion 211 will be deformed slightly inward during the installation process and fixed into the concave pit 12 after the deformed forked holding portion 211 resumes its original shape. In addition, the conductive handle 21 includes a notch 212 formed on a side of the conductive handle 21, and the conductive handle 21 includes a positioning slot 213 disposed at a position of the block 13 corresponding to the insulating base 10, and the fuse filament 22 in this preferred embodiment is substantially U-shaped. Of course, the fuse filament 22 can be in other appropriate shapes for other preferred embodiments.
With reference to
With reference to
With reference to
The present invention is illustrated with reference to the preferred embodiment and not intended to limit the patent scope of the present invention. Various substitutions and modifications have suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.
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|Citing Patent||Filing date||Publication date||Applicant||Title|
|US8976000 *||Nov 2, 2011||Mar 10, 2015||Littelfuse, Inc.||Blade fuse|
|US20120044037 *||Nov 2, 2011||Feb 23, 2012||Littelfuse, Inc.||Blade fuse|
|U.S. Classification||337/186, 337/198, 337/187|
|International Classification||H01H85/153, H01H85/175|